Process for the production of alloys of high melting-point having ductile properties.



F at the same UNITED STATES PATENT OFFICE- HANS KAISER, OF AUGSBURG, GERMANY,.ASSIGNOB TO THE FIRM .OF WOLFRAM- LAMPEN AKTIEN GESELISCHAFT, OF AUGSIBURG, GERMANY.

PROCESS FOR THE PRODUCTION OF ALLOYS OF HTGH MELTING-POINT HAVING DUGTILE PROPERTIES.

1 ,167,82 7. Specification of Letters Patent.

No Drawing.

To alt whom it may concern 'Be it known thatL-HansKarsnn, a citizen of the German Empire, and residing at Augsburg, Germany, have invented certain new andus'eful Improvements in Processes for the Production of Alloys of High Melt ing-Point Having Ductile Properties, of which the following is a specification.

This invention relates to the production of alloys or solid metallic solutions of high melting point.

It is already Well known to produce sintered bodies of great toughness and elasticity from the metals chromium, vanadium, niobium, tantalum, osmium, ruthenium, zirconium, thorium, or tungsten by choosing one of the said metals as the base or body. material and adding a smaller amount of another of the said metals, the resultant mixture being formed under pressure to a suitable shape and sintered at a high temsecond additional metal is of such a nature that it will result in the thorou h alloying of the metals or the formation 0 a solld solution. The amount of this second metal added is extremely small in proportion to the first added metal, and it cannot be regarded as having the same action as the first added metal. The metals of the platinum group have proved particularly effective when used as the. second added metals. Additions of a fraction of one per cent. of these metals, for instance about 1/2() per cent. of

latinum itself will suffice to produce the aloying of tungsten with 1% thorium at a comparatively low sintering temperature. The addition of the third metal for example of platinum, may advantageously be effected time as the mixing of the base and the first added metal, for instance by adding the aqueous solution. of any suitable Application filed February 14, 1914. Serial No. 818,620.

salt of the second additional metal. Alloys ofrhigh melting point having ductile properties produced in this way may be employed as the incandescence bodies of electric glowlamps or as filament supports, as parts of firearms, or as tools and instruments for various purposes.

I claim and desire to obtain by Letters Patent the following:

1. The process substantially as herein described, of making alloys or solid solutions of high melting point having ductile properties, from the rare metals, which consists in preparing a mixture composed of one of said metals as a base or foundation metal, with the addition of a smaller amount of a second one of said metals, and an extremely small added amount of a. third one of'said metals, and sintering the product.

2. The process substantially as herein described, of making alloys or solid solutions of high melting point having ductile properties, from the rare metals, which consists in preparing a mixture composed of one of said metals as a base or foundation metal,

with the addition of a smaller amount of a second one of said metals, and an added amount in the proportion of a fraction of one per cent. or less of a third one of said metals, and sintering the product.

3. The rocess substantially as herein described 0 making alloys or solid solutions of high melting point having ductile properties, from the rare metals (such as chromium, vanadium, niobium, tantalum, osmium, ruthenium, zirconium, thorium and tungsten) which consists in preparing a mixture composed of one of said metals as a base or foundation metal, with the addition of a smaller amount'of a second one of said metals, and an added amount of a fraction of one per cent. of a different metal of the platinum group, forming the mixture under pressure to suitable shape, and sintering the product. s

In testimon whereof I afiix my signature in presence 0 two witnesses.

. HANS KAISER.

Witnesses: 

